This series traces the major advances in knowledge in Western civilization since the Greeks, and demonstrates how our view of the world changes as our knowledge develops.

American University professor Allan J. Lichtman delivers forty-eight lectures on twelve of America's presidents.

The "Long Debate" on the nature of truth, the scale of real values, the life one should aspire to live, the character of justice, the sources of law, and the terms of civic and political life is encompassed by the name philosophy. Three persistent themes--understood as problems--are knowledge, conduct, and governance, on which there is a storehouse of insights, some so utterly persuasive as to have shaped thought itself. Beginning with Plato and Aristotle,...